XML Validator
Validate XML syntax — error details and pretty-print
🔒 Files never leave your browser
XML Input 0 chars
Formatted Output
How to Use XML Validator
Paste XML
Paste your XML content.
Validate
See valid/invalid status with error details.
Copy formatted
Copy the pretty-printed XML.
Why Choose AllTools XML Validator?
- ✓ 100% free, no account needed
- ✓ DOMParser validation
- ✓ Error line numbers
- ✓ Pretty-print output
- ✓ Valid/invalid badge
- ✓ No data stored or transmitted
Why Use This Tool
- ★ No data leaves your browser — safe for proprietary code and sensitive data
- ★ Instant processing with zero server latency
- ★ No account or API key required
- ★ Works offline after initial page load
- ★ Supports latest syntax standards and specifications
Related Resources
Frequently Asked Questions
How does validation work? ▼
Uses the browser DOMParser to parse XML and check for syntax errors.
Is this private? ▼
Yes. All validation happens in your browser.
Is there a file size limit? ▼
No strict limit. Processing happens in your browser, so capacity depends on your device memory. Most files work smoothly.
Which browsers are supported? ▼
All modern browsers including Chrome, Firefox, Safari, Edge, and Opera on both desktop and mobile.
Can I use this offline? ▼
Yes. Once the page is loaded, the tool works without an internet connection since all processing is local.
Is my data secure? ▼
Yes. Your data never leaves your browser. Nothing is stored on or transmitted to any server.
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